Statistical analysis
Continuous data were expressed as median and interquartile range (IQR)
or mean and standard deviation (SD) and compared between groups using
ANOVA. Qualitative variables were presented as percentages and compared
between groups using Chi2 test or Fisher’s exact test.A univariate Cox
model was performed to compare the occurrence of events in each group.
All tests were two-sided. A p-value < 0.5 was considered
significant for all analysis.
R Studio ™ statistical software (RStudio, Inc. 2019 version,
1.2.5001) was used.